And NCDC USES the entire 20th century.

NCD C用得失整个20世纪的气候数据。

Both NCDC and NASA use data that goes back to 1880.

NCDC和NASA使用的数据可以追溯到1880年。

But there is a lot of climate data the NCDC and other public databases don't have.

但在美国国家气候资料中心和其他公用数据库中，还是缺乏大量的气候数据。

The NCDC has records for thousands of weather stations, some dating back more than a century.

美国国家气候资料中心存有数万气象站的记录数据，一些数据能追溯到一百多年以前。

NCDC also reports that the North American snow cover extent for the month was the smallest on record for April.

NCDC还报告说，当月北美积雪程度是有记录以来四月份最小的。